Production of isotactic and regiorandom polypropylene based...

Details Production of isotactic and regiorandom polypropylene based... Production of isotactic and regiorandom polypropylene based...

2008-04-22

2011-10-18

Lee, Rip A. (Department: 1762)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

Reexamination Certificate

active

08039655

ABSTRACT:
One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF3SO3H. Condensation of the product to give ligand and metallation gives complex which catalyzes polymerization of propylene to give isotactic propylene or regiorandom propylene of low PDI or blocks thereof, depending on polymerization temperature.

REFERENCES:
patent: 6737487 (2005-05-01), Meverden
patent: 7176158 (2007-02-01), Chow et al.
patent: 2005/0131160 (2005-06-01), Shimizu
Cherian et al., Chem. Commun. 2003, 2566-2567.
Cherian, A.E., et al., “A C2-Symmetric, Living α-Diimine Ni(II) Catalyst: Regioblock Copolymers from Propylene”, J. Am. Chem. Soc. 2005, 127, 13770-13771, and Supporting Information.
Cherian, A.E., et al., “Acid-Catalyzed ortho-Alkylation of Anilines with Styrenes: An Improved Route to Chiral Anilines with Bulky Substituents”, Organic Letters, 2005, vol. 7, No. 23, 5135-5137, Published on Web Oct. 13, 2005, and Supporting Information.

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